Any advice on scraping an 85 dodge d150 5.2 L?

If you have the time to maximize your profit, you might do Ebay or Craigslist or one of the many Swap sites in every commuity via Facebook.
But then again, when you part it out, there's a waiting period between scrap and sale and you're inviting strangers to your premises who may want to haggle over price. You'll also apply alot of time taking it apart and may need to buy more tools etc. I recently hauled one to the scrapyard just like your 85. Don't remember the weight exactly but guessing it was over 2 ton. The price locally is $95 a ton. Not a great return, but it's a Load 'N' Go situation. I've seen people drive vehicles into the scrapyard, take the battery out and walk away.